US Patent 11359724 Contamination exclusion for seal ring with conductive nonwoven fiber

A sealing assembly including a housing including a bore and a shaft rotatably disposed in the bore. A primary radial shaft seal is secured to the housing and includes a sealing lip engaging the shaft. A buffer seal made of an electrically conductive non-woven fabric which is arranged adjacent to the primary radial shaft seal and in contact with the housing and the shaft. A secondary contaminant exclusion seal is secured to the housing and includes at least one dust lip. The buffer seal is sandwiched between the primary radial shaft seal and the secondary contaminant exclusion seal.